Sunrise Granted Patent for Mesophase Carbon Microsphere–Silicon Carbon Composite Anode Material, Strengthening Leadership in Solid-State Battery Anode Technologies
Rhea-AI Summary
Sunrise New Energy (NASDAQ: EPOW) announced that its subsidiary was granted invention patent CN115188949B on October 6, 2025, for a mesophase carbon microsphere–silicon carbon composite anode material.
The patent describes a multi-step preparation method including polymerizing medium-temperature pitch, sedimentation/centrifugation, plasma modification, electrochemical silicon deposition with organosilane/organic lithium additives, washing and carbonization to produce a composite anode.
The company says the composite improves lithium-ion transport, structural stability, compressive strength and addresses silicon anode challenges of volume expansion and ionic conductivity, supporting large-scale solid-state battery industrialization and further R&D investment.
Positive
- Patent CN115188949B granted on October 6, 2025
- Novel composite targets silicon anode volume expansion
- Claims improved lithium-ion transport and structural stability
- Supports large-scale solid-state battery industrialization
Negative
- None.
Insights
Patent grants IP protection for a novel mesophase carbon–silicon composite anode, strengthening technical defensibility.
The granted patent CN115188949B documents a specific preparation route using polymerized pitch, sedimentation, plasma modification, electrochemical silicon deposition, washing, and carbonization to produce mesophase carbon microsphere–silicon carbon composite anodes.
This approach explicitly targets improved lithium transport, structural stability, and compressive strength, addressing volume expansion and ionic conductivity challenges in silicon‑containing anodes during solid‑state battery assembly. The claims therefore protect a materials‑level solution to those technical failure modes.
Monitor the patent number CN115188949B and the company statement about ongoing R&D investment for signs of scale‑up or licensing. The approval on
This patent strengthens Sunrise's competitive position in solid‑state anode IP and supports its industrialization messaging.
By securing an invention patent, Sunrise gains exclusivity over a defined manufacturing method and composite structure. That exclusivity can aid technology transfer, supply agreements, and R&D leverage without revealing trade secrets.
The company explicitly links the patent to enhanced energy density, cycle life, and safety, and commits continued R&D investment. Watch for concrete follow‑ups such as pilot production, partnerships, or licensing announcements to validate commercial impact. The patent grant dated
DOVER, USA, Oct. 06, 2025 (GLOBE NEWSWIRE) -- Sunrise New Energy Co., Ltd. (“Sunrise”, the “Company”, “we” or “our”) (NASDAQ: EPOW) today announced that its subsidiary, Sunrise (Guizhou) New Energy Materials Co., Ltd., has been granted an invention patent titled “Preparation Method of a Mesophase Carbon Microsphere–Silicon Carbon Composite Anode Material” (Patent Granted No. CN115188949B). This newly granted patent represents a major technological breakthrough in solid-state battery anode materials, solidifying Sunrise’s leading position in the field of next-generation solid-state battery technologies and advancing its innovation roadmap in high-performance energy materials.
The patented invention discloses an innovative method for preparing mesophase carbon microsphere–silicon carbon composite anode materials. The process involves polymerizing medium-temperature pitch in a reactor to obtain polymerized pitch, followed by sedimentation and centrifugation to produce mesophase carbon microspheres. These microspheres are then modified using plasma technology to create modified mesophase carbon microspheres. An organic solvent containing an organosilane coupling agent and organic lithium salt is prepared, and silicon salts are deposited onto the modified microsphere surface via an electrochemical deposition method, followed by washing and carbonization to yield the final composite material.
This patented technology plays a critical role in the development of solid-state batteries. The newly developed composite material demonstrates superior lithium-ion transport, structural stability, and compressive strength, significantly enhancing the energy density, cycle life, and safety of solid-state batteries. By optimizing the structural interface between carbon and silicon, the technology effectively overcomes the challenges of volume expansion and ionic conductivity faced by silicon-based anodes during high-pressure solid-state battery assembly, providing key technical support for the large-scale industrialization of solid-state batteries.
“This patent approval further strengthens Sunrise’s leadership in solid-state battery anode materials,” said Haiping Hu, Founder and CEO of Sunrise New Energy. “We will continue to expand our R&D investment, focusing on innovation and industrialization of next-generation battery materials, and accelerating the establishment of a globally leading new energy materials technology platform.”
About Sunrise New Energy Co., Ltd
Headquartered in Zibo, Shandong Province, China, Sunrise New Energy Co., Ltd., through its joint venture, is engaged in the manufacturing and sale of graphite anode material for lithium-ion batteries. The Company's joint venture has completed the construction of a manufacturing facility with a production capacity of 50,000 tons in Guizhou Province, China. The plant runs on inexpensive electricity from renewable sources, which helps to make Sunrise New Energy a low-cost and low–environmental-impact producer of graphite anode material. Mr. Haiping Hu, the founder and CEO of the Company, is a major pioneer for the graphite anode industry in China starting from 1999. The Company’s management team is also composed of experts with years of experiences and strong track-records of success in the graphite anode industry. In addition, the Company also operates a knowledge sharing platform in China. For further information, please visit the Company’s website at www.sunrisenewenergy.com.
Forward-looking statement
Certain statements in this press release regarding the Company's future expectations, plans and prospects constitute forward-looking statements as defined by Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements about plans, goals, objectives, strategies, future events, expected results, assumptions and any other factual statements that have not occurred. Any words that refer to "may", "will", "want", "should", "believe", "expect", "expect", "estimate", "estimate" or similar non-factual words, shall be regarded as forward-looking statements. Due to various factors, the actual results may differ materially from the historical results or the contents expressed in these forward-looking statements. These factors include, but are not limited to, the company's strategic objectives, the company's future plans, market demand and user acceptance of the company's products or services, technological updates, economic trends, the company's reputation and brand, the impact of industry competition and bidding, relevant policies and regulations, the ups and downs of China's macroeconomic conditions, the relevant international market conditions, and other related risks and assumptions disclosed in the Company’s Annual Report on Form 20-F published on the SEC’s website. In view of the above and other related reasons, we urge investors to visit the SEC’s website and consider other factors that may affect the Company's future operating results. The Company is under no obligation to make public amendments to changes in these forward-looking statements unless required by law.
For more information, please contact:
The Company:
IR Department
Email: IR@sunrisenewenergy.com
Phone: +86 4009919228
FAQ
What did Sunrise (EPOW) receive on October 6, 2025?
How does the patented method prepare the composite anode material?
What battery improvements does Sunrise claim for the new anode (EPOW)?
Does the patent specifically target commercialization of solid-state batteries?
Will Sunrise increase R&D after the patent grant (EPOW)?
